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. 2014 Sep 4;3(5):172–176. doi: 10.1002/open.201402019

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© 2014 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Changes to the UV-vis absorption (top) and emission (bottom) spectra of 2 (100 μm) (solid line) in acetone (0.1 m nBu₄NPF₆) in the presence of nBu₄NF (4 equiv) (dashed line), and in the mixture in the presence of trifluoroacetic acid (4 equiv) (dotted line).